Slow LAN Performance - Switch Related?
I have a client with about 40 users 6 servers. The current switch layout can be seen at http://www.xtsix.com/CiscoSwitch.htm.
This does not seem to be the most efficient layout to me, but I'm not sure. I am open to any and all recommendations.
They are experiencing slow file access and the Great Plains users in particular complain about perfomance issues.
Aside from physical layout, what else should I look at before making recommendations?
Thanks.
This does not seem to be the most efficient layout to me, but I'm not sure. I am open to any and all recommendations.
They are experiencing slow file access and the Great Plains users in particular complain about perfomance issues.
Aside from physical layout, what else should I look at before making recommendations?
Thanks.
ASKER
I will double check, but to the best of my knowledge the answer to both questions is Yes.
All ports are set to 100MB FULL and they are all on the same subnet.
All ports are set to 100MB FULL and they are all on the same subnet.
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TheCleaner: Correct, Cicso uses Etherchannel.
jra102: You stated that the Great Plains users are complaing. You doc shows that this server has two connects to two differn switches. Are the NIC's setup for NIC teaming? If not, how do you get traffic split accros the NIC's?
Have you anything that will show you port utilziation? The 2950 is SNMP enabled, so you could use something like MRTG to look at port utilziation's to see if lack of bandwidth could be an issue. You will need to verify what the devices connect to the switchports with, especially duplex. It is not abnormal to have duplex mis-match. We have a device that has been negotiating 10-half for years, I was originally told that 10-half was all it could do. Well, we just found out that it can do 100-full.
If switch to switch traffic is getting bottle necked at 100 Full, then follow TheCleaner's advice and setup a Etherchannel connection between the switches. Cisco supports up to 4 ports in channel, so you could do up to 400 Mbps full duplex.
jra102: You stated that the Great Plains users are complaing. You doc shows that this server has two connects to two differn switches. Are the NIC's setup for NIC teaming? If not, how do you get traffic split accros the NIC's?
Have you anything that will show you port utilziation? The 2950 is SNMP enabled, so you could use something like MRTG to look at port utilziation's to see if lack of bandwidth could be an issue. You will need to verify what the devices connect to the switchports with, especially duplex. It is not abnormal to have duplex mis-match. We have a device that has been negotiating 10-half for years, I was originally told that 10-half was all it could do. Well, we just found out that it can do 100-full.
If switch to switch traffic is getting bottle necked at 100 Full, then follow TheCleaner's advice and setup a Etherchannel connection between the switches. Cisco supports up to 4 ports in channel, so you could do up to 400 Mbps full duplex.
Hi,
I havn't got the chance to use cisco switchesyet , but once i had the same problem with 3Com switches, All the ports were conigured on 100 FD. After that i found out that changing it to Auto Neotiation quads the performance, the NIC's work much better when auto negotation is set.
I havn't got the chance to use cisco switchesyet , but once i had the same problem with 3Com switches, All the ports were conigured on 100 FD. After that i found out that changing it to Auto Neotiation quads the performance, the NIC's work much better when auto negotation is set.
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giltjr: I don't know if the NICs are set up for teaming...I am just getting acquainted with this environment and will be on site tomorrow, so I will check futher. I will also verify that devices are connecting at 100-full.
What do you think about tomerlei's comment? I have heard different opinions about autonegotiation...I can see setting the workstation ports to auto but should the servers and network devices be forced to 100-full?
What do you think about tomerlei's comment? I have heard different opinions about autonegotiation...I can see setting the workstation ports to auto but should the servers and network devices be forced to 100-full?
My servers are on autonegotiation too, between network devices if both are set on autonegotiation there should be no problem.
As far as i know its the optimal configuration for speed, atleast with 3Com and Nortell switches i got to use so far.
As far as i know its the optimal configuration for speed, atleast with 3Com and Nortell switches i got to use so far.
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Are all ports set to 100Mb full duplex?
Are all the attached devices in the same subnet/broadcastt domain or have you vlanned the switches at all?